Bathtub



FIG. 1 is an upper right front perspective view of a bathtub showing our new design in accordance with the present invention;

FIG. 2 is an upper left rear perspective view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a right side elevation thereof in a raised condition.

The portions of the bathtub shown in broken lines form no part of the claimed design.

The dashed-dotted line showing of FIG. 6 illustrates a boundary between the claimed design and environmental features. 

CLAIM The ornamental design for a bathtub, as shown and described. 